84446009 has 2 divisors, whose sum is σ = 84446010. Its totient is φ = 84446008.

The previous prime is 84445993. The next prime is 84446017. The reversal of 84446009 is 90064448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81504784 + 2941225 = 9028^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 84446009 - 2⁴ = 84445993 is a prime.

It is a super-2 number, since 2×84446009² = 14262256872056162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84446009.

It is not a weakly prime, because it can be changed into another prime (84446029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42223004 + 42223005.

It is an arithmetic number, because the mean of its divisors is an integer number (42223005).

Almost surely, 2^84446009 is an apocalyptic number.

It is an amenable number.

84446009 is a deficient number, since it is larger than the sum of its proper divisors (1).

84446009 is an equidigital number, since it uses as much as digits as its factorization.

84446009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 84446009 is about 9189.4509629248. The cubic root of 84446009 is about 438.7256671651.

The spelling of 84446009 in words is "eighty-four million, four hundred forty-six thousand, nine".